       rep-diff (partial extensions/replica-diff entry)
       rep-reactions (partial extensions/reactions entry)
       old-replica {:pairs {:a :b :b :c :c :a} :peers [:a :b :c]
+                   :messaging {:onyx.messaging/impl :dummy-messenger}
                    :job-scheduler :onyx.job-scheduler/greedy}
       new-replica (f old-replica)
       diff (rep-diff old-replica new-replica)]

      rep-diff (partial extensions/replica-diff entry)
      rep-reactions (partial extensions/reactions entry)
      old-replica {:pairs {:a :b :b :a} :peers [:a :b]
                   :job-scheduler :onyx.job-scheduler/greedy}
      new-replica (f old-replica)
      diff (rep-diff old-replica new-replica)]

      rep-diff (partial extensions/replica-diff entry)
      rep-reactions (partial extensions/reactions entry)
      old-replica {:job-scheduler :onyx.job-scheduler/balanced
                   :messaging {:onyx.messaging/impl :dummy-messenger}
                   :pairs {:a :b :b :c :c :a} 
                   :peers [:a :b :c]
                   :jobs [:j1 :j2]
